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Measurement and Instrumentation

Measurement and Instrumentation
The coil of a moving coil meter has 100 turns, is 40 mm long and 30 mm wide. The control torque is 240×10-6 N-m on full scale. If magnetic flux density is 1Wb/m2 range of meter is

 1 mA.
 3 mA.
 2 mA.
 4 mA.

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Measurement and Instrumentation
To the y input of a CRO a signal defined by 10sin100t is applied. To the x input the signal 10cos100t is fed. The gain for both x-channel and y-channel is the same. The screen shows

 a straight line.
 an ellipse.
 sinisoidal.
  a circle.

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Measurement and Instrumentation
What is the approximate input impedance of a CRO?

 10 MΩ
 0
 1 MΩ
 100 MΩ

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Measurement and Instrumentation
The use of thermocouple meters for AC measurement leads to scale which is

 expontial.
 square law.
 linear.
 logarithmic.

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Measurement and Instrumentation
Which one the following statements is correct? The application of the instrument in wrong manner in the procedure of measurement results in a/an

 instrument error
 systematic error
 random error
 gross error

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Measurement and Instrumentation
Two capacitance, C1 = 150 ± 2.4µF and C2 = 120 ± 1.5 µF are connected in parallel. What is the limiting error of the resultant capacitance C (in µF) ?

 3.9µF
 2.4µF
 0.9µF
 1.5µF

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